Factors impacting commercial carrot seed germination rates in hot water treated seed lots
Abstract Bacterial blight of carrot (Daucus carota L. subsp. sativus), caused by Xanthomonas hortorum pv. carotae is a worldwide problem in carrot production systems. Due to the pervasiveness of the bacterial blight pathogen and lack of effective in-field treatment programs for its management, produ...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Springer
2025-06-01
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| Series: | Discover Agriculture |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/s44279-025-00258-9 |
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| Summary: | Abstract Bacterial blight of carrot (Daucus carota L. subsp. sativus), caused by Xanthomonas hortorum pv. carotae is a worldwide problem in carrot production systems. Due to the pervasiveness of the bacterial blight pathogen and lack of effective in-field treatment programs for its management, production of pathogen-free seed remains a challenge. Infected seed lots typically require costly post-harvest sanitation practices such as hot water treatments before the seed can be marketed. Ordinary Least Squares regression was used to build a model to improve understanding of factors that impact seed germination rates after hot water treatment. A total of 69 observations from 65 seed lots inclusive of 30 varieties produced in the Pacific Northwest from 2018 to 2022 were used for the analysis. Stressful environmental conditions characterized by the heat and haze documented during the 2021 and 2022 growing seasons did not impact post-hot water treatment germination rates, nor did hot water treatment batch size. Germination rates before hot water treatment were found to positively impact germination rates after hot water treatment. Irrigation practices were found to have an impact on post-hot water treated germination rates. On average, sprinkler irrigated seed exhibited a 1.90% higher germination rate after hot water treatment when compared to seed produced in furrow irrigated fields. When compared relative to an heirloom Nantes variety, all other varieties considered in the analysis exhibited a 3.49% lower germination rate after hot water treatment on average. Clinical trial number: Not applicable. |
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| ISSN: | 2731-9598 |